Designation:D5042−90(Reapproved2009)StandardTestMethodforEstimatingtheOrganicFoulingofParticulateAnionExchangeResins1ThisstandardisissuedunderthefixeddesignationD5042;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodprovidesageneralestimateoftheorganicfoulingofananionexchangeresinbasedupontotalorganiccarbonmeasurements.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Foraspecifichazardstatement,see8.3.2.ReferencedDocuments2.1ASTMStandards:2D1129TerminologyRelatingtoWaterD1193SpecificationforReagentWaterD2187TestMethodsforPhysicalandChemicalPropertiesofParticulateIon-ExchangeResinsD2579TestMethodforTotalOrganicCarboninWater(Withdrawn2002)3D2687PracticesforSamplingParticulateIon-ExchangeMa-terialsD4839TestMethodforTotalCarbonandOrganicCarboninWaterbyUltraviolet,orPersulfateOxidation,orBoth,andInfraredDetection3.Terminology3.1Definitions—Fordefinitionsoftermsusedinthistestmethod,refertoTerminologyD1129.3.2DefinitionsofTermsSpecifictoThisStandard:3.2.1organicfouling—buildupoforganicmaterialinoronanionexchangeresinsbysorptionduringtheservicecycleandincompleteremovalduringregeneration.4.SummaryofTestMethod4.1Asampleofparticulateanionexchangematerialiscontactedwithasodiumchloride/sodiumhydroxidesolutionatanelevatedtemperature.Afteraspecifiedcontacttime,theconcentrationoforganicmaterialintheaqueousphaseismeasuredastotalorganiccarbon4(TOC).5.SignificanceandUse5.1Oneofthemajorfactorsintheunsatisfactoryperfor-manceofanionexchangeresinsistheirfoulingbyo...
